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Action:
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Determines whether a given
cvty is concave or not.
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Filename:
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intr/intr_scm/cvty_typ.cxx
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Syntax:
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(cvty:concave cvty)
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Arg Types:
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cvty
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scm_cvty
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Returns:
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boolean
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Description:
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This extension returns
#t if the given
cvty is concave and
#f if it is not. Equivalent to the C++
cvty::concave.
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Note
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Additional enquiry functions such as cvty:concave-tangent etc. are defined in scm/examples/cvty.scm
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cvty represents the convexity at a point or along a single edge (or something equivalent), such as convex, tangent convex etc.
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Example:
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; cvty:concave
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; Create a block.
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(define block1 (solid:block (position 0 10 0)
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(position 10 20 20)))
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;; block1
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; Define the edges of block1
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(define edge-list (entity:edges block1))
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;; edge-list
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; Determine if an edge is concave
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(cvty:concave (pt-cvty-info:instantiate
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(edge:mid-pt-cvty-info
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(list-ref edge-list 0)) -1))
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;; #f
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